Participant type

Age group

Gender

Target number of participants

Participant exclusion criteria

1. Smokers2. People on special diets (e.g. vegetarians, coeliac patients)3. People with diabetes4. Pre-existing chronic disease5. Regular use of prescription medicine, including statins and blood pressure medication6. People who regularly take any vitamin or mineral supplement or have done so in the last 6 months7. Women who are pregnant or lactating 8. People who have given blood to the blood transfusion service (BTS) within the past 4 months